1. Newspaper article (1929): "Stock Market Crash devastates economy, leading to the Great Depression."

2. Witness quote (1963): "I'll never forget the day JFK was assassinated, it felt like the world stopped."

3. Detailed background (1989): "The fall of the Berlin Wall symbolized the end of the Cold War and the reunification of Germany."

4. Fictional character (2001): "I was in shock when the Twin Towers fell on 9/11, it changed everything."

These historic events have had a lasting impact on global economies and societies.